EP0451470A2 - Cylindre à enveloppe déformable - Google Patents

Cylindre à enveloppe déformable Download PDF

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Publication number
EP0451470A2
EP0451470A2 EP91102665A EP91102665A EP0451470A2 EP 0451470 A2 EP0451470 A2 EP 0451470A2 EP 91102665 A EP91102665 A EP 91102665A EP 91102665 A EP91102665 A EP 91102665A EP 0451470 A2 EP0451470 A2 EP 0451470A2
Authority
EP
European Patent Office
Prior art keywords
pressure
roller
line
crosshead
cylinder chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP91102665A
Other languages
German (de)
English (en)
Other versions
EP0451470A3 (en
Inventor
Bernhard Funger
Klaus Kubik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Publication of EP0451470A2 publication Critical patent/EP0451470A2/fr
Publication of EP0451470A3 publication Critical patent/EP0451470A3/de
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
    • F16C13/026—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure
    • F16C13/028—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure with a plurality of supports along the length of the roll mantle, e.g. hydraulic jacks
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0206—Controlled deflection rolls
    • D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member
    • D21G1/022—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member the means using fluid pressure

Definitions

  • the invention relates to a deflection-controllable roller of the type corresponding to the preamble of claim 1.
  • Such a roller belongs to the prior art due to the unpublished DE-OS 38 35 152.
  • DE-OS 38 35 152 separate, parallel pumps are provided for the bearing pockets in the support element and its piston / cylinder unit.
  • a check valve is provided in the feed line to the storage pockets in the embodiment according to DE-OS 38 35 152, so that if the line breaks between the assigned Pump and the non-return element an immediate backflow of the liquid from the storage pockets is avoided, but the pressure in the storage pockets and with it the liquid film on their edges decrease very quickly and the check valve can only offer a temporary protection, which in certain situations is not is sufficient if the pressure in the piston / cylinder unit cannot be reduced quickly enough in another way, for example controlled by pressure sensors.
  • a generic roller which also has two pumps which, however, do not work in parallel, but are to a certain extent connected in series.
  • the pump for supplying the storage pockets builds up a certain pressure.
  • the pump for supplying the piston / cylinder unit is connected to the pressure line of the first pump and has its outlet pressure as the inlet pressure. In the event of a break in the supply line to the bearing pockets, the pressure in the piston / cylinder unit does not necessarily drop suddenly and there are therefore certain risks of accident.
  • the invention has for its object to make the hydraulic supply of a generic roller easier and immediately safer.
  • the pressure ratio in the two supply lines is closely related to the closing direction of the check valve. If the pressure in the supply line to the bearing pockets were lower than that in the supply line to the piston / cylinder unit, the check valve would open and the piston / cylinder unit could not develop sufficient pressure to press the support element. Due to the higher dimensioning of the pressure in the supply line to the storage pockets, the check valve remains closed and opens in normal operating condition only when there is a break in the supply line to the storage pockets and the supply pressure of the storage pockets drops. If the supply line to the piston / cylinder unit breaks, this is no problem because the contact pressure is then eliminated.
  • the check valve in conjunction with the pressure rating results in a relatively simple means for an overall arrangement which is secured against line breakage at any point in such a way that no accident can occur due to the support elements being eaten on the inner circumference of the hollow roller.
  • the bearing pockets and the cylinder chamber of the piston / cylinder unit have effective areas of hydraulic pressure which are in a certain relationship to one another. In order to arrive at a functional arrangement, there are corresponding conditions for the pressures.
  • the effective area of the bearing pockets is generally somewhat larger than that of the piston / cylinder unit, so that in the state of equilibrium the pressure in the bearing pockets has to be somewhat lower than that in the piston / cylinder unit.
  • a correspondingly strong throttling in the throttle channels is required. This can be achieved, for example, by inserting an appropriate orifice which has the advantage of being independent of the viscosity of the hydraulic fluid compared to throttle bores.
  • a first possible embodiment of the invention is the subject of claim 2.
  • the provision of only one pump significantly reduces the structural effort and the effort associated with pump control.
  • the two supply lines now assume a common pressure connection on the pump or on a common pressure line.
  • the pressure in the supply line to the piston / cylinder unit is controllably reduced by the pressure reducing valve in order to achieve a change in the contact pressure and thus the total force exerted by the support element. Irrespective of this, the pump always delivers a uniform flow rate, so that the temperature conditions on the roller are not pressure-dependent.
  • a pressure reducing valve requires a certain small volume flow to function properly. If the leakage flow emerging from the cylinder chamber is not sufficient for this, an auxiliary channel according to claim 3 is recommended, which ensures a constant slight outflow from the cylinder chamber and thus the required volume flow without significantly influencing the pressure build-up in the cylinder chamber.
  • Another possible embodiment of the invention is the subject of claim 4.
  • the arrangement of the check valve functions as a safety device in the same way.
  • the pair of rollers shown in FIG. 1 comprises an upper roller 10 and a lower roller 100, between which a web 30 is subjected to a pressure treatment in the nip 31.
  • the top roller 10 is a conventional solid roller.
  • the lower roller 100 comprises a circumferential hollow roller 1, the outer circumference 2 of which forms the working roller circumference and which is penetrated lengthways by an rotatable crosshead 3, which leaves distance from the inner circumference 4 of the hollow roller 1 on all sides, so that it is displaced within the hollow roller 1 can, without coming into contact with the inner circumference 4.
  • the hollow roller 1 can be supported at the ends on bearings, not shown, on the crosshead 3. In this case, the displacement only affects the deflection of the crosshead 3 inside the hollow roller 1.
  • the hollow roller 1 can, however, in an alternative embodiment, which is also referred to as an "inner stroke", as a whole in the active plane with respect to the crosshead 3 relocate.
  • the hollow roller 1 is not supported by the bearings on the crosshead, but is only guided in the active plane.
  • the shift relates to the shift in the management, which overlaps the deflection.
  • the pins 21 of the top roller 10 and the ends 5 of the crosshead 3 projecting from the hollow roller 1 at their ends are supported in the roller stand (not shown).
  • a plurality of hydraulic support elements 14, 14' are arranged distributed over the length of the hollow roll, the support elements 14, 14 'being adapted in shape to the outer circumference 4 of the hollow roll 1 24 on the inner circumference 4 of the hollow roller 1 issue. 2 and 3 two possible embodiments 14, 14 'of the support elements are explained.
  • Flat bearing pockets 25 are formed in the contact surface 24, which occupy a substantial part of the contact surface 24, so that only marginal webs remain of it.
  • the support element 14 is circular in cross section, but it can also be square or rectangular.
  • the contact surface 24 has an edge web 26 extending around the entire circumference and two intersecting central webs 27, so that four segment-shaped bearing pockets 25 are formed (FIG. 6).
  • the support element 14 comprises an approximately cup-shaped housing 28, which faces the crosshead 3 with the open side and has a bottom 29, on its "underside", which, however, in the drawing above, i.e. against the roll gap 31, the bearing pockets 25 are provided.
  • a peripheral seal 17 is provided on the outside, with which the pot-shaped housing 28 is sealingly guided in a cylindrical bore 18 of the crosshead designed as a radial blind bore.
  • the housing 28 and the cylinder bore 18 form a piston / cylinder unit, under the action of which the support element 14 can be pressed against the inner circumference 4 of the hollow roller 1.
  • the cylinder bore 18 forms with the pot-shaped housing 28 a cylinder space 39 which can be supplied with pressure fluid from outside the roller via a supply line 38 running in the crosshead 3, but is otherwise closed.
  • the hose 32 represents a movable part of the feed line 46, with which the pressure fluid can be brought from the crosshead 3 into the bearing pockets 25 of the support element 14 which is radially displaced with respect to the crosshead 3.
  • the cup-shaped housing 28 is not guided on its outside in a cylinder bore 18 of the crosshead 3, but on its inside on an annular piston 35 placed on the top 3 'of the crosshead 3, which cooperates with the cylindrical inner circumference 33 of the cup-shaped housing 28 and which Piston / cylinder unit forms.
  • the cylinder chamber 39 under the pressure of which the support element 14 'is pressed against the inner circumference 4 of the hollow roller 1, is in this case between the top of the piston 35 and the bottom 29.
  • the piston 35 has a central bore 36 which is connected to the feed line 46 is connected and into which a tubular extension 37 of the bottom 29 is immersed in a sealed manner by means of a seal 40.
  • the tubular extension 37 in the bore 36 forms a kind of additional piston / cylinder unit and contains the Throttle channels 23 leading bore 22.
  • the support member 14 ' can move radially with respect to the piston 35 located on the top 3' in the same way as the support member 14 in the cylinder bore 18.
  • the cylinder chamber 39 is annular due to the presence of the approach.
  • the support elements 14, 14 ' are supplied with hydraulic fluid via a hydraulic fluid supply unit V (FIG. 1), of which two embodiments V' and V '' are shown in FIGS. 4 and 5.
  • the supply unit V supplies pressure fluid via the supply lines 38 and 46 to the support elements 14, 14 '.
  • the pressure in the supply line 38 is controllable and forms the hydrostatic pressure in the cylinder chamber 39, under the action of which the support element 14, 14 'is pressed against the inner circumference 4 of the hollow roller 1. This in turn determines the outflow resistance from the bearing pockets 25. If a constant amount of pressure fluid is then supplied to the bearing pockets 25 via the feed line 48, the pressure in the bearing pockets 25 initially rises until the hollow roller 1 lifts somewhat from its edge web 26 and the pressure fluid can pave its way between them.
  • the pressure in the bearing pockets 25 drops again (because of the throttling in the channels 23) and an equilibrium is formed at a certain self-adjusting pressure in the bearing pockets 25, in which the gap between the edge web 26 and the Inner circumference 4 of the hollow roller 1 has a certain size and the pressure fluid supplied flows out in a constant amount per unit of time and, with appropriate temperature control, also exchanges constant amounts of heat with the hollow roller 1.
  • Fig. 1 all support elements are connected in parallel and are subjected to the same pressures. In order to influence the line pressure, however, groups of support elements 14, 14 'or even each are normally used these support elements 14, 14 'are supplied with separate pressures.
  • the supply lines 38 and 46 are therefore only symbolically represented as a single line, but in practice can also consist of several lines leading to individual groups of support elements or individual support elements, to which different pressures are impressed in the supply unit V.
  • a single quantity-controlled pump 12 is provided in the supply unit V 'according to FIG.
  • the feed line 46 is connected directly to the pump 12 and contains no further flow-influencing elements.
  • a branch line 13 leads from the feed line 46 to a pressure reducing valve 15, to which the feed line 38 is connected, which supplies the cylinder chamber 39.
  • the pressure reducing valve 15 lowers the pressure in the line 46 connected to the pressure side of the pump 12 by a certain adjustable ratio and thus acts hydrostatically on the cylinder chamber 39.
  • the pressure reducing valve requires a small volume flow of liquid to pass through, due to the leakage on the piston 35 or through a specially provided, dashed auxiliary channel in the form of a throttle bore 43 can be guaranteed, which leads from the cylinder chamber 39 into the space 7 between the crosshead 3 and hollow roller 1.
  • the feed lines 38 and 46 are connected by a connecting line 45, which opens into the feed line 38 between the pressure reducing valve 15 and the annular piston 35.
  • a check valve 16 is arranged in the connecting line 45 and blocks against the supply line 38.
  • feed line 38 has its own separately controllable pump 48.
  • the feed line 38 leads directly from the pump 48 into the cylinder chamber 39 and contains no further flow-influencing elements, just like the feed line 46.
  • the feed lines 38, 46 are connected by a connecting line 45 to a check valve 16 which blocks the feed line 38. If the supply lines 46 or 38 break, the same safety function results as in the embodiment according to FIG. the support element 14 'cannot be pressed against the inner circumference 4 of the hollow roller 1 without bearing pocket pressure.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP19910102665 1990-04-12 1991-02-23 Deflection controlled drum Ceased EP0451470A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011826 1990-04-12
DE4011826A DE4011826C1 (fr) 1990-04-12 1990-04-12

Publications (2)

Publication Number Publication Date
EP0451470A2 true EP0451470A2 (fr) 1991-10-16
EP0451470A3 EP0451470A3 (en) 1991-12-11

Family

ID=6404266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102665 Ceased EP0451470A3 (en) 1990-04-12 1991-02-23 Deflection controlled drum

Country Status (3)

Country Link
EP (1) EP0451470A3 (fr)
DE (1) DE4011826C1 (fr)
FI (1) FI911541L (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699799A1 (fr) * 1994-08-29 1996-03-06 Voith Sulzer Papiermaschinen GmbH Rouleau à déflection réglable
WO1998017862A1 (fr) * 1996-10-23 1998-04-30 Valmet Corporation Cylindre tubulaire muni de coussinets a glissement a chargement hydraulique
EP0803607A3 (fr) * 1996-04-24 1998-12-23 Voith Sulzer Finishing GmbH Rouleau à réglage de la flexion
DE10024851A1 (de) * 2000-05-19 2002-01-31 Netzsch Erich Holding Walze mit Durchbiegungsausgleich
CN106494945A (zh) * 2016-12-04 2017-03-15 重庆永富电线电缆有限公司 电缆卷输送装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030537C1 (fr) * 1990-09-27 1991-10-10 Kleinewefers Gmbh, 4150 Krefeld, De
DE9211162U1 (de) * 1992-08-20 1994-01-27 Eduard Küsters Maschinenfabrik GmbH & Co KG, 47805 Krefeld Walze
CA2187381C (fr) * 1995-11-02 1999-05-11 Rolf Van Haag Cylindre a deflexion reglable pour calandre
DE10019585C2 (de) * 2000-02-03 2003-03-20 Walzen Irle Gmbh Wärmetauscher mit Sicherheitsventil
FI121891B (fi) * 2009-12-18 2011-05-31 Metso Paper Inc Kuituraina- tai kuiturainan jälkikäsittelykoneen taipumakompensoitu tela, menetelmä kuiturainakoneen tai kuiturainan jälkikäsittelykoneen taipumakompensoidun telan värähtelyominaisuuksien säätämiseksi sekä menetelmä kuiturainakoneen tai kuiturainan jälkikäsittelykoneen taipumakompensoidun telan varustamiseksi paineakulla

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193792B (de) * 1961-06-30 1965-05-26 Textilmaschinen Eduard Kuester Walze fuer die Druckbehandlung von Warenbahnen
DE3306838A1 (de) * 1983-02-26 1984-08-30 J.M. Voith Gmbh, 7920 Heidenheim Presswalze, deren durchbiegung einstellbar ist
CH673051A5 (fr) * 1986-07-08 1990-01-31 Escher Wyss Ag
DE3813598C1 (fr) * 1988-04-22 1989-11-23 Eduard Kuesters, Maschinenfabrik, Gmbh & Co Kg, 4150 Krefeld, De
DE3835152C1 (fr) * 1988-10-15 1990-04-26 Eduard Kuesters, Maschinenfabrik, Gmbh & Co Kg, 4150 Krefeld, De

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699799A1 (fr) * 1994-08-29 1996-03-06 Voith Sulzer Papiermaschinen GmbH Rouleau à déflection réglable
US5662571A (en) * 1994-08-29 1997-09-02 Voith Sulzer Papiermaschinen Gmbh Deflection controlled roll
EP0803607A3 (fr) * 1996-04-24 1998-12-23 Voith Sulzer Finishing GmbH Rouleau à réglage de la flexion
US5980438A (en) * 1996-04-24 1999-11-09 Voith Sulzer Finishing Gmbh Adjustable deflection roll
WO1998017862A1 (fr) * 1996-10-23 1998-04-30 Valmet Corporation Cylindre tubulaire muni de coussinets a glissement a chargement hydraulique
US6346066B1 (en) 1996-10-23 2002-02-12 Valmet Corporation Tubular roll provided with hydraulically loaded glide bearings
DE10024851A1 (de) * 2000-05-19 2002-01-31 Netzsch Erich Holding Walze mit Durchbiegungsausgleich
DE10024851B4 (de) * 2000-05-19 2005-06-16 Erich Netzsch Gmbh & Co Holding Kg Walze mit Durchbiegungsausgleich
DE10024851C5 (de) * 2000-05-19 2010-12-16 Erich Netzsch Gmbh & Co Holding Kg Walze mit Durchbiegungsausgleich
CN106494945A (zh) * 2016-12-04 2017-03-15 重庆永富电线电缆有限公司 电缆卷输送装置

Also Published As

Publication number Publication date
EP0451470A3 (en) 1991-12-11
DE4011826C1 (fr) 1991-08-01
FI911541A7 (fi) 1991-10-13
FI911541A0 (fi) 1991-03-28
FI911541L (fi) 1991-10-13

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